Display screen or portion thereof with transitional graphical user interface



FIG. 1 is the first image in a sequence for a display screen or portionthereof with transitional graphical user interface showing our newdesign;

FIG. 2 is the second image thereof;

FIG. 3 is the third image thereof;

FIG. 4 is the fourth image thereof;

FIG. 5 is the fifth image thereof; and,

FIG. 6 is an enlarged view of the portion 6 encircled in FIG. 5.

The outer perimeter shown in evenly-spaced dashed broken line in thefigures depicts a display screen or portion thereof and forms no part ofthe claimed design. The remaining evenly-spaced dashed broken lines inthe figures depict portions of the transitional graphical user interfacethat form no part of the claimed design. The dot-dot-dash broken linesin FIGS. 5 and 6 encircle portions of the claimed design that are shownenlarged in FIG. 6, and form no part of the claimed design.

The appearance of the transitional image sequentially transitionsbetween the images shown in FIGS. 1-5. The process or period in whichone image transitions to another image forms no part of the claimeddesign.

CLAIM The ornamental design for a display screen or portion thereof withtransitional graphical user interface, as shown and described.